Title :
Adaptive open loop power control and impact on the Erlang capacity of LEO satellite CDMA systems
Author :
Zihua, Guo ; Letaief, Khaled
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Kowloon, China
Abstract :
Satellite systems are some of the key telecommunications systems which have the potential of achieving ubiquitous and global personal communications. The satellite component of IMT-2000 based on DS/CDMA system, such as SW-CDMA, has been proposed. For such systems, power control (PC) is critical, and only open loop power control (OLPC) is feasible. We propose an adaptive OLPC method for DS/CDMA satellite communication systems based on a Markov chain channel model. We then derive the Erlang capacity of the satellite DS/CDMA system with this PC scheme and demonstrate that power Control error (PCE) affects the Erlang capacity significantly. In addition, dual-satellite diversity is considered and we show that diversity can significantly improve the Erlang capacity of the satellite CDMA system
Keywords :
Markov processes; adaptive control; channel capacity; code division multiple access; diversity reception; mobile satellite communication; multiuser channels; personal communication networks; power control; spread spectrum communication; telecommunication control; DS/CDMA satellite communication systems; Erlang capacity; IMT-2000; LEO satellite CDMA systems; Markov chain channel model; SW-CDMA; adaptive open loop power control; dual-satellite diversity; global personal communications; power Control error; power control; telecommunications systems; Adaptive control; Artificial satellites; Error correction; Information technology; Low earth orbit satellites; Multiaccess communication; Power control; Power system modeling; Programmable control; Satellite communication;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851395
